Megaphone bell



FIG. 1 is a perspective view of a megaphone bell showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof, the left side being a mirror image;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The dash-dash type broken lines shown in the drawing views are included for the purpose of showing environmental subject matter that forms no part of the claimed design. 

CLAIM The ornamental design for a megaphone bell, as shown and described. 